Many people are experimenting with gluten avoidance to help them learn if they are mildly or moderately gluten intolerant. Blood tests and intestinal wall biopsies are useful for patients with the most severe case, celiac disease, but not for the millions of people whose tests results were normal who are still having symptoms . They are sometimes told they probably have irritable bowel syndrome (IBS).

Now we can measure the precise degree of sensitivity in these less-than-severely sensitive people with a single saliva sample. This test is the most accurate test for gluten intolerance, and it is easy, cheap, and extremely helpful clinically. It is the key test for many people with unresolved muscle and joint pain, fatigue, intestinal discomfort, and even nutrient deficiencies. It can be done alone for $44 or along with tests for dairy, egg, and soy proteins for only $58. This affordable test is a breakthrough for patients, and I would like to see more doctors using it.